Not very scientific, but a cheap trick that may work is
force the interface on your switch to full duplex, and your PC connected
to that interface to half duplex...
May be enough to simulate what you are after...
Cheers
Andrew

On Sun, 2003-09-28 at 11:54, Stefan Neufeind wrote:

Hi,
this is not directly ISP-related but maybe someone has already done
some sort of thing like this for simultion or otherwise has an idea:
How could I achieve to randomly drop UDP-packets on the input-chain
of a server?